ASTM A403 WP304L Equal Tee SA403 WP304 Reducing Tee ASME B16.9 Pipe fittings
ASTM A403 WP304L equal tees and WP304 reducing tees are stainless steel butt weld pipe fittings used to connect and branch pipelines. Manufactured according to ASME B16.9, these fittings provide excellent corrosion resistance, weldability, and reliable performance in chemical, water, and general industrial piping systems.
We are a professional manufacturer and global supplier of ASTM A403 WP304L tees, including equal tees and reducing tees, produced in accordance with ASME B16.9 standards.
What is ASTM A403 WP304/L Material?
ASTM A403 WP304/L refers to the dual-certified grade of stainless steel. The “W” indicates wrought austenitic stainless steel, and “P” denotes piping grade. This material is commonly used in piping systems requiring excellent corrosion resistance and superior weldability.
ASTM A403 WP304L is a low-carbon austenitic stainless steel, offering:
- Excellent corrosion resistance
- Superior weldability
- Good strength at low and moderate temperatures
- Resistance to intergranular corrosion
Product Range – WP304L Tee
We supply a full range of ASTM A403 WP304L pipe tees:
- Equal Tee (Straight Tee)
- Reducing Tee (Unequal Tee)
- Seamless Tee
- Welded Tee
- Custom size tees
ASTM A403 WP304L Tee Specifications
| Parameter |
Details |
| Standard |
ASME B16.9 / MSS-SP-43 |
| Material |
ASTM A403 WP304 / WP304L |
| Size |
1/2” NB to 48” NB |
| Thickness |
Sch 10S to Sch XXS |
| Type |
Seamless / Welded |
| Form |
Equal Tee / Reducing Tee |
| End |
Butt Weld (BW) |
Chemical Composition – WP304 / WP304L
| Element |
WP304 (%) |
WP304L (%) |
| Carbon (C) |
≤0.08 |
≤0.03 |
| Chromium (Cr) |
18.0 – 20.0 |
18.0 – 20.0 |
| Nickel (Ni) |
8.0 – 11.0 |
8.0 – 12.0 |
Mechanical Properties
| Property |
Value |
| Tensile Strength |
≥ 515 MPa |
| Yield Strength |
≥ 205 MPa |
| Elongation |
≥ 35% |
Features of ASTM A403 WP304L Tee
- Excellent corrosion resistance in harsh environments
- Low carbon content reduces carbide precipitation
- Ideal for welding applications
- Smooth flow distribution in pipelines
- Long service life with minimal maintenance
Testing & Inspection
All WP304L tees are tested to ensure quality:
- Visual & Dimensional Inspection
- Chemical Analysis
- Mechanical Testing
- PMI (Positive Material Identification)
- NDT (UT / RT / PT) if required
Certification:
- EN 10204 3.1 / 3.2 MTC
- Third-party inspection available
Applications of WP304L Tee
ASTM A403 WP304L tees are widely used in:
- Chemical processing plants
- Pharmaceutical industries
- Marine applications
- Food & beverage pipelines
- Water supply systems
Example Order Description
WP304 vs WP304L Difference
| Grade |
Carbon Content |
Advantage |
| WP304 |
Higher |
Stronger |
| WP304L |
Lower |
Better welding & corrosion resistance |
Why Choose Our WP304L Tee?
- Direct factory supply
- Competitive pricing
- Strict quality control
- Fast delivery worldwide
- Export to 50+ countries
Global Export Markets
We supply ASTM A403 WP304L tees to:
- Middle East (UAE, Saudi Arabia, Qatar, Oman)
- Southeast Asia (Indonesia, Malaysia, Vietnam, Thailand)
- Europe (Germany, Italy, Spain)
- North America (USA, Canada)
- Africa (South Africa, Nigeria)
Related Products of ASTM A403 WP304L Equal Tee
We supply a full range of ASTM A403 WP304L stainless steel pipe fittings, including elbows, reducers, caps, and flanges for complete piping solutions.

ASTM A403 WP304L Equal Tee
Stainless Steel 304L Pipe Fittings